Is there a way this extension might work with a pop-up when I click on an event shown on my blog, instead of taking me to the google calendar page where is my event (with the rest of the info)? Something like fancybox would be just great. I would like to add google calendar as a sidebar column named "Coming Events" and when users click on an event to have it shown in a pop-up window.

If it hadn't been for the recent improvement in security (to avoid clickjacking) we could have just use a simple iframe with a special CSS class and Fancybox (through the Fancybox extension). Now you have to open a new window using a JavaScript onclick event.